The Effect of Envronmental Variability on Livestock and land-use management: The Borana Plateau, Southern Ethiopia
Title | The Effect of Envronmental Variability on Livestock and land-use management: The Borana Plateau, Southern Ethiopia PDF eBook |
Author | |
Publisher | ILRI (aka ILCA and ILRAD) |
Pages | 40 |
Release | |
Genre | |
ISBN |
Determinants of Cereal Diversity in Communities and on Households Farm of the Northern Ethiopian Highlands
Title | Determinants of Cereal Diversity in Communities and on Households Farm of the Northern Ethiopian Highlands PDF eBook |
Author | Samuel Benin, Berhanu Gebremedhin, Melinda Smale, John Pender, and Simeon Ehui |
Publisher | Intl Food Policy Res Inst |
Pages | 80 |
Release | |
Genre | Social Science |
ISBN |
Public-private Partnerships in Agricultural Research
Title | Public-private Partnerships in Agricultural Research PDF eBook |
Author | David J. Spielman |
Publisher | Intl Food Policy Res Inst |
Pages | 66 |
Release | 2004 |
Genre | Social Science |
ISBN |
National and International Agricultural Research and Rural Poverty: The Case of Rice Research in India and China
Title | National and International Agricultural Research and Rural Poverty: The Case of Rice Research in India and China PDF eBook |
Author | Shenggen Fan, Connie Chan-Kang, Keming Qian, and K. Krishnaiah |
Publisher | Intl Food Policy Res Inst |
Pages | 48 |
Release | |
Genre | Social Science |
ISBN |
Assessing the Spatial Distribution of Crop Production Using a Cross-Entropy Method
Title | Assessing the Spatial Distribution of Crop Production Using a Cross-Entropy Method PDF eBook |
Author | Liangzhi You and Stanley Wood |
Publisher | Intl Food Policy Res Inst |
Pages | 48 |
Release | 2012 |
Genre | Social Science |
ISBN |
While agricultural production statistics are reported on a geopolitical - often national - basis we often need to know the status of production or productivity within specific sub-regions, watersheds, or agro-ecological zones. Such re-aggregations are typically made using expert judgments or simple area-weighting rules. We describe a new, entropy-based approach to making spatially disaggregated assessments of the distribution of crop production. Using this approach tabular crop production statistics are blended judiciously with an array of other secondary data to assess the production of specific crops within individual "pixels" - typically 25 to 100 square kilometers in size. The information utilized includes crop production statistics, farming system characteristics, satellite-derived land cover data, biophysical crop suitability assessments, and population density. An application is presented in which Brazilian state level production statistics are used to generate pixel level crop production data for eight crops. To validate the spatial allocation we aggregated the pixel estimates to obtain synthetic estimates of municipio level production in Brazil, and compared those estimates with actual municipio statistics. The approach produced extremely promising results. We then examined the robustness of these results compared to short-cut approaches to spatializing crop production statistics and showed that, while computationally intensive, the cross-entropy method does provide more reliable estimates of crop production patterns.
Demand for Rainfall-index Based Insurance
Title | Demand for Rainfall-index Based Insurance PDF eBook |
Author | Nancy A. McCarthy |
Publisher | Intl Food Policy Res Inst |
Pages | 39 |
Release | 2003 |
Genre | Social Science |
ISBN |
The Economics Of Generating And Maintaining Plant Variety Rights In China
Title | The Economics Of Generating And Maintaining Plant Variety Rights In China PDF eBook |
Author | Bonwoo Koo, Philip G. Pardey, Keming Qian, and Yi Zhang |
Publisher | Intl Food Policy Res Inst |
Pages | 52 |
Release | 2003 |
Genre | Social Science |
ISBN |